New Schalke signing Coke has suffered a cruciate knee ligament injury on his debut for the club and is facing a potentially lengthy spell on the sidelines.
The Bundesliga club sealed the 29-year-old's signing from Sevilla last Sunday, but received a massive blow in the defender's first match.
Coke played in the first half Schalke's 2-1 friendly victory over Bologna in Austria on Thursday, but picked up the injury from what the club described as a "heavy challenge" and is now set for a long-term absence.
Schalke's statement read: "The Spaniard damaged the cruciate ligament in his right knee and will consequently be out of action for the foreseeable future.
"The 29-year-old featured for 45 minutes in the game and developed pain in his right knee after a heavy challenge. Tests have established that ligament damage has been sustained, with the severity to be determined over the course of the next few days."
He said: "We are shocked. Our thoughts are with Coke at this point, least of all because he had already settled in well here.
"We will support him however possible throughout the lay-off."
Primer partido/ My first time/ mein erstes Mal ... August 5, 2016
